The Storus Smart Belt Buckle is a unique alternative to carrying a wallet. What makes the Smart Belt Buckle innovative is that it features a hidden storage chamber large enough to hold up to 3 credit cards or ID's inside. This makes it a great alternative storage option for those who do not like to or aren't able to carry around a wallet. To use the Smart Belt Buckle it will need to be attached to a belt strap which is sold separately. The Smart Belt Buckle measures 2.5" H x 3.8" W x 0.4" L.